Abstract
An ultrasonic beam incident on a liquid-solid interface is displaced appreciably when the angle of incidence is such that Rayleigh surface waves. are generated on the interface. Experimental results obtained with a Gaussian amplitude distribution across the incident beam are discussed in connection with the theory of Schoch and Brekhovskikh. Examinations of the reflected beam near the Rayleigh angle using a schlieren technique and a precision goniometer reveal that the energy is redistributed .into· multiple beams, one or more of which may be dominant.
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